Monitoring and enhanced fatigue evaluation of a steel railway bridge

Leander, John; Andersson, Andréas; Karoumi, Raid

doi:10.1016/j.engstruct.2009.12.011

Cited by 78 publications

(38 citation statements)

References 10 publications

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“…Bracings are provided at two levels, one at the top to connect the rails and other at the bottom to connect the cross beams. Additional details regarding the bridge can be found in [10].…”

Section: Bridge Description and Finite Element Modelmentioning

confidence: 99%

“…This is followed by linear, time-history analyses of the bridge under the passage of selected trains. The results are compared with analytical solutions as well as field measurements which were carried out under the passage of a test locomotive over the bridge [10]. It should be noted that recently, a fatigue evaluation of the case-study bridge considered in this paper was carried out elsewhere [10].…”

Section: Introductionmentioning

confidence: 99%

“…The results are compared with analytical solutions as well as field measurements which were carried out under the passage of a test locomotive over the bridge [10]. It should be noted that recently, a fatigue evaluation of the case-study bridge considered in this paper was carried out elsewhere [10]. This paper, on the other hand, focuses on investigating the dynamic behaviour and dynamic characteristics of the bridge.…”

Section: Introductionmentioning

confidence: 99%

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Advanced dynamic finite element analysis of a skew steel railway bridge

Kaliyaperumal

Imam

Righiniotis

2011

Engineering Structures

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“…Bracings are provided at two levels, one at the top to connect the rails and other at the bottom to connect the cross beams. Additional details regarding the bridge can be found in [10].…”

Section: Bridge Description and Finite Element Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Advanced dynamic finite element analysis of a skew steel railway bridge

Kaliyaperumal

Imam

Righiniotis

2011

Engineering Structures

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“…The observed fatigue cracks were later repaired, however, the capacity assessment identified other fatigue critical connections [1]. A field measurement campaign was performed, partly verifying the theoretical estimates [5][6][7][8]. Geometrical improvement of the most critical connections have been proposed, showing a potential improvement of the fatigue service life when assessed with local stress methods, further to be presented in this paper.…”

mentioning

confidence: 99%

Extending the fatigue service life of a railway bridge by local approaches

Andersson¹,

Leander²,

Karoumi³

2013

IABSE Conference, Rotterdam 2013: Assessment, Upgrading and Refurbishment of Infrastructures

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SummaryIn this paper, fatigue assessment of a steel railway bridge is presented. The bridge is located in central Stockholm, Sweden, and is one of the most vital links for the railway network. The bridge services both freight trains and commuter trains with more than 500 passages per day. The main load bearing structure is designed as a steel grillage of welded I-beams. Fatigue critical sections have been identified at locations where secondary bracing systems are welded to the flanges of the I-beams. Both numerical simulations and extensive field measurements have shown a significant exceedance of the theoretical fatigue service life. Based on analysis of local stress concentrations, improvement of fatigue critical details have been suggested. The decrease in stress concentration is demonstrated both by numerical simulations and in-situ field measurements and shows a significant improvement when estimating the remaining fatigue service life.

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“…The monitoring-based approaches, however, provide authentic fatigue stress spectra. Especially, the recent development of structural health monitoring (SHM) systems enables long-term measurements on structural responses of bridges subjected to various loads and their combined action [14][15][16][17][18]. However, the long-term SHM is often costly and not all concerned details could be covered due to limited budget.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Reliability Assessment of Orthotropic Steel Bridge Decks Based on Probabilistic Multi-Scale Finite Element Analysis

Guo¹,

Liu²,

Zhu³

2015

Volume 11 Number 3

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ABSTRACT:The orthotropic steel deck (OSD) has been utilized successfully for thousands of bridges worldwide; however, fatigue cracking of the OSD has been observed frequently due to the complicated welded details combined with stresses that can be difficult to quantify, and the uncertainties in fatigue damage accumulation. In this paper, a fatigue reliability assessment method is proposed based on a comprehensive vehicle load model and probabilistic multi-scale finite element (FE) analysis. The vehicle load model, obtained from statistical data of toll stations, consists of probability distribution functions regarding the number of axles, axle weights, and transversal positions of vehicles, etc. The multi-scale finite element model not only captures the main features of the entire bridge but also gives an accurate description on local stress responses of the OSD in a relatively efficient way. Based on the probabilistic FE analysis combined with the developed vehicle load model, the fatigue reliabilities of the OSD could be obtained. Application of the proposed method is made in the fatigue reliability assessment of the OSD of the Runyang Cable-stayed Bridge for demonstration. INTRODUCTIONThe orthotropic steel deck (OSD) has been utilized successfully for thousands of bridges worldwide due to its notable advantages [1], i.e., increased rigidity, material savings, low maintenance, suitability for standardization and prefabrication, etc. However, fatigue cracking of the OSD is frequently observed in practice [2-5], resulting in considerable maintenance or rehabilitation costs. During the past decades, design specifications and approaches to predict the remaining fatigue life of the OSD have been developed and applied actively [6][7][8][9][10]. However, the challenge for extending the fatigue life of the OSD still exists, resulting from the complicated welded details in which stresses can be difficult to quantify. Besides, with the increase of span lengths, bridges are becoming more flexible, which makes them more vulnerable to the vehicle loads, wind-induced vibration and/or fluctuations of ambient temperatures [11]. Therefore, the accurate prediction of fatigue life of the OSD requires that all influencing factors should be taken into account, which includes not only the configuration of fatigue details and vehicle loads but also the global structural behavior and/or environmental effect, etc.In fatigue analyses, one important step is to obtain the fatigue stress spectra, and in general there are two types of approaches, namely the model-based approaches and monitoring-based approaches. The traditional way of obtaining the fatigue stress spectra on bridges is based upon the stress analysis with a traffic load model and a structural model [12][13]. Therefore, the accuracy of model-based approaches depends upon the rationality of traffic load models as well as the structural models. The monitoring-based approaches, however, provide authentic fatigue stress spectra. Especially, the recent development of structural h...

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Monitoring and enhanced fatigue evaluation of a steel railway bridge

Cited by 78 publications

References 10 publications

Advanced dynamic finite element analysis of a skew steel railway bridge

Advanced dynamic finite element analysis of a skew steel railway bridge

Extending the fatigue service life of a railway bridge by local approaches

Fatigue Reliability Assessment of Orthotropic Steel Bridge Decks Based on Probabilistic Multi-Scale Finite Element Analysis

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